The valves work against pressure. When you move the lever and it "locks" into position, the valve is supposed to return to the neutral position (center / lever on reservoir straight up and down) when the hydraulic cylinder reaches the end of the stroke. If it doesn't Im betting the cam in the reservoir is an added problem as well. The Eaton pumps did have a problem with the keyway on the shaft wearing as well as the center gear on the shaft getting cracked by the keyway. They will still operate just fine when they are cracked though. They should be the same as a U, I will take a look in the parts book, if so I might have one here you can just install. It is a used pump. There aren't any rebuilts for those as far as I know. I think you would be farther ahead finding a different pump than repairing yours, since there are a lot of them out there more than the parts available.
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Today's Featured Article - The Nuts and Bolts of Fasteners - Part 2 - by Curtis Von Fange. In our previous article we discussed capscrews, bolts, and nuts along with their relative hardness and thread sizes. In this segment we will finish up on our fasteners and then work with ways to keep them from loosening up in the field. Capscrews, bolts and nuts are not the only means of holding two parts together. When dealing with thinner metals like sheet tin, a long bolt and
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